[If the hive] fills the entire house, and there is less than a handbreadth of space be-tween [the hive] and the joists, [and] there is tumah inside [the hive], the house be-comes tamei. [If] there is tumah inside the house, anything inside [the hive] remains tahor, because it is the way of tumah to exit, but not the way [of tumah] to enter — [this law applies] whether [the hive] is standing upright or whether it is lying on its side, [and] whether there is one [hive] or there are two.